style: 修改数据集左侧树，hover样式

data-room-ui/packages/assets/style/zTree/metroStyle.css

@@ -1,7 +1,7 @@
 
 .ztree * {padding:0; margin:0 ; font-size:12px;}
 .ztree {margin:0; padding:5px; color:#36474f;}
-.ztree li{overflow: hidden; position: relative; display:block;padding:0; margin:0; margin-right:10px; list-style:none; line-height:12px; text-align:left; white-space:nowrap; outline:0}
+.ztree li{overflow: hidden; position: relative; display:block;padding:0; margin:0; list-style:none; line-height:12px; text-align:left; white-space:nowrap; outline:0}
 /* .ztree li:hover{cursor: pointer;} */
 /* .ztree li:hover{ background-color:  rgba(0, 0, 0, 0.025)} */
 .ztree li ul{  margin:0; padding:0 0 0 18px;height: auto;}